Although mookie beat me to the wristwatch joke, when I think of an "Ironman" I think of this:
Chuck Norris sold his soul to the devil for his rugged good looks and unparalleled martial arts ability. Shortly after the transaction was finalized, Chuck roundhouse kicked the devil in the face and took his soul back. The devil, who appreciates irony, couldn't stay mad and admitted he should have seen it coming. They now play poker every second Wednesday of the month.
Oh, and congrats Ironman!